Tubing machine



D. F. DOMIZI.

1 meme MACHINE. APPLICATION FILED AUGJ, 19I9.

a Q 6 &m '0 5 z m 7 m. I a vN .2 o 9 4 D. F. DOMIZI.

TUBING MACHINE; APPLICATION .FILIED AUGJ. 1919.

Patented Sept. 19, 1922.

4 SHEETS-SHEET 2.

' n. F. DOMIZI.

TUBING MACH INE.

I APPLICATION FILED AUGJ, I919.

' Patented 119,1922) 4 TS-SHEET 4.

Patented Sept. 19, 1922.

' .nnnfan are.

DAVID DQMIee 9 eesve ena' en ol-1 I -TUBLNG Macngnn App ication-filed A gust 7. 1919. Serial 1m). 315,5 5;

To nll w lip m it may concern:

Be it snei n tha l, D VE 1F: D E n, e citizen of the United States, residing at Cleveland; in the county of Quyahog'a and State of Ohio, hagveinyented a certain new nd M et-L mp e em e in Tubing M ehiileeef W i the qll iv ne iiuli, l ar; and exact description. I

T s i e t on elat to e nib-ins 1 eh n r i tm stubee ite the ehee metal s c by d ng th s e ensed emeedrel nd -l ing a the me sing th ed es in a longitudinally extending seam. ,;';Ihe, invention has specialnti lity in forming bow 806118.33 heue'h i i n n riee in itstus to .articles of that lrind', but may be employed for forming tubes for other purposes,,either t h e k peree I a The principal objecto-f this invention is to providea reliable tubing nachine, ,which works rapidly, and either continuously or nt m tt nt y a .ele ed, wi el p t en with the possible exception Off the feeding of th te Perfe ma ma c l y- Further the invention aims to provide a machine which .cloes eif ectiveand neat work,

r e e y i forming e sea t gh a uniiorm from end to end of the tube.

The invention consists in certain novel details of construction. and combinatim sand arrangements of parts which will be .described in the specification andset forth in the appendedclaims.

Inthe accompanying sheets of drawings wherein I have shown one embodiment of my invention which operates-with high 61fficiency, Fig. l isa side view ofthe machine; Fig. 2 is an end \view looking toward the right of 1; Fig. 3 is a vertical sectional view; Fig. 4 is an enlarged cletai llvjew illustrating certain co-operating cam members which actuate one of the folding jaws; Fig. 4 is a similar view of a cam which actuates the rail or cross head carrying the pressing blade; and Figs. 5 to ;9-are diagrammatic views illustrating different steps;

in the cycle of operation in forming the tubes. 7

Referring now to the drawings it will .be

observed that the machine includes a heavy frame composed of two vertical-end members 1 0, 11, connected together at the ;top by a top member l2, and by alower .cross m m e w ic xt nd Jee ween, e ds se ured w the end member's made, as

or bed on the-upper iiace of which :is' secured a. die lei, consisting of a bar .or' block with a lqngitudi aily eXtending, upwardly facing. groove lg? sufficient insizeitransversely .cone elered, an i l n t to lfiabout which the .StQck, which is indicated at l6, 1 s bentto torn: the tube. The .man'd'rel' is carried by a vertically movable member 17, see Fig. 1) which projects laterally .oute l. .l mllgfhe slo i th nd irame mem ber 1,1,]and 1s carriedby a vertical slide 18 uided ior up an dow movement on the ut iae efith en m @memb 1 e l trell d, n th ann hereinafter ex? plained. I (Ordinarily, i. epriorto thestart- .ingv of the ,t1,i-be forming op.e .tio,11,. t-he man- 'receive a mandrel di'el 15 extends in Substantially horizontal position abovethe slot of the die,'. a'sindicated' 95 ig- :3- 1l t nStai c th nia dre is tapered, as the ,Inachine here Shown is adapted fo te m g tapered h w s ckets; a

ut .Q e eee, th s pee h mandrel will ensed upo th eh r et or o 5 h u which i to h peod ee from flat stock. The mounting of the mandrel .in the holder is such that the mandrel canvbe read y r ine ed secur d i .pe i thus edep ing th nme ie 01 q i k nt rchange of mandrels for various sizes or types of tubes. fifOreleavmg the mandrel and its mounting it might be stated that thepnorma-l' position Qft-he mandrel with respect to the die can be readily varied since the mandrel supporting member 1,7 includesflan extension 1;!) V hlChdS bolted to the slide 18in such a.

manner that the relative positions of the parts 18 and 19 can :be .varied as desired.

The part 1-9 may be'provided .withbolts such as shown at the right hand side of Fig. '1,

which extend through elongated slots of the slide 18.

' The tube gforming mechanism includes in addition to the die and mandrel above ex plained, a vertically movable cross-head or rail 20, which is guided at its ends on "the inner faces of the end frame members 10 and 11. Thiscross-head. or rail carries what may be termed a presser strip or blade 21 which is directly above the mandrel, 1'5, as clearly held in elevated position by a pair of shown in Fig.- 3. The crossehead is normally Y mandrel down into the slot of the die so as to fold the flat stock 16 into substantially U-shape, and subsequently to form a'seam when the crimped edges of the stock have been interlocked by being bent inwardly by folding jaws.

These folding jaws'25 are in the form of substantially horizontal blades supported and mounted so as to swing toward and from each other just above the die 14, the support and manner of actuating these jaws forming one of the important parts of this invention. The jaws are in this instance carried by a pair of substantially horizontally disposed flat plates or bars 26 adjustably secured by bolts'27, to a pair of cross members 28 disposed on opposite sides of the bed 13. Each of these cross members 28 is clamped to a pair of upright swinging arms or rods 29, one pair being onone side of the machine, and the other pair being on the opposite side, these rods being'secured at their. lower ends to pivot or hinge members 30 mounted to turn on horizontal rods- 31' at the bottom of the machine.

For the purpose of adjusting the height of the cross members 28, and hence of the and outwardly, or at least inwardly, by

swinging the upright arms 29 through the medium of devices provided at the upper ends of the rods, and cam members carried by the main actuating shaft 34.

It is another important feature of my in vention, that the cams or equivalent devices which actuate all the different parts of the machine are carried by this one shaft 34, the machine being designed with this end in view, to bring about correct timing of the operating parts, and to prevent derangement or improper mounting of cams, since all cams can be fastened in place by a single keyway and when once properly designed, are therefore required to function in a predetermined timed relationship.

This shaft 34 is rotatably supported in the end frame members 10 and 11 near the top of the machine, a short distance below the top frame member 12. The shaft is designed to be rotated either continuously or intermittently by a motor 35 mounted on the top frame member 12, near the end frame member 11, and connected by reduction gearing indicated as a whole by the reference character 36, to a horizontal cross shaft 37, in turn connected by reduction gearing including a large gear 38, to the operating shaft 34. This gear is designed to be clutched to, and unclutched from the shaft 34 by any suitable clutch mechanism common in machines ofthis kind, thisv clutch mechanism including clutch operating parts'39, shown in Fig. 2, connected by a rod 39 to a foot pedal 40 at the bottom of the machine. If the operator holdsthe foot pedal depressed, the shaft 34 is rotated continuously, or until the pedal is released, or if the operator desires the shaft to be stopped after one cycle, of operations is completed, he will depress the foot pedal and then release it so that the shaft will stop after making one rotation, as is well understood. It might be mentioned, however, at this point, that the design of the present machine is such that the tube is actually formed in only a small part of the revolution of the shaft 34, thus allowing an ample portion of the time consumed in one complete cycle for placing stock in position on the machine. By reason of this feature it has been found that the machine can be operated continuously, rather than intermittently as is the case with all prior machines of this character of which I am aware.

For the purpose of operating the cross head 20 and presser blade 21, the shaft 34 is provided with two cams 41, one of which is shown in detail in Fig. 4 Each cam 41 carries two rollers 42, each pair adapted to successively engage a roller 43 mounted on the top of the crosshead 20, these rollers being so disposed that as the shaft 34 is rotated, the rollers of the two cams engage the cross-head rollers 43 with a direct downward thrust so as to lower the cross-head, th cross-head being elevated by the weights 22, as previously explained when the roll- 42 ride off the cross-head rollers 43. The two rollers 42 of each cam 41 are disposed a sufficient distance apart, in this case 90 apart, so as to cause the cross-head. to be lower-ed twice in each 0* cle of operations with the desired interval of time between cross-head rollers 43, arc-shaped sections 4- 1 of the cam ride over the rollers 43 of the cross-head so as to hold the latter stationary.

during the major portion of the cycle of the machine.

To operate the folding jaws, the operating shaft 34 is provided with four cams 45, (a detail of one of which is shown in Fig. 4), each provided with a roller 46, the four cams being arranged in two pairs, each pair being nearone-end of-the shaft, just outside of one of the cross-head lowering cams 4'1, and the cams of each pair be'ing side by side, as shown in Fig. 1. (Jo-operating with these cams 4-5 are Cshaped yokes 47, (a detail of one of which is shown in Fig. each having a roller 4:8, :these 'yokes being securely bolted to the upper ends of the jaw swinging arms or rods "29.. The two yokes carried by the two arms on (one side of the machine :face in the same direction, but-in the opposite direction with respect to the facing of the yokes carried by the paircof arms 29 on the opposite side of the machine. The rollers -46 of :the cams cooperating with the yokes carried by thearms ononeside ofthe'maohine are disposed 180, or are diametrically opposite from the irollers 4:6;of1the cams d5 .co-aoperating with the yokes 0f1the rods on the [opposite side of the machine. It will be apparent, therefore, that since the yokes all "face inwardly and since the .ends of .each yoke are attached .-to the associatedswinging arms-29.0n one side of :the cam 45, and the yoke roller 48 .is at the middle .portioniof the yoke .on :the opposite side of the .cam, the effect of rotating cam :rollers d6 :on :the yoke rollers 48 is :to swing the four arms '29 inwardly, and :therefore swing the (folding jaws -25 towardeach other. It is" by ithismoyement that the metal is bent around :the mandrel in .such a way as to cause the.crimped edgesof theistockito interlock. As soon as the vcam rollers 46 ride off the yoke :rollers 48, the swinging arms 29 and :the partscarried therebyare swung back .toinormal position by springs49 (see Fig. 3) orequivalentmeans, the springs here shown being carried by the cross members 28 and being compressed by the movement of the cross members toward the dined bed 13. Adjustable screws 50 inside the cross members '28, and carried by brackets 51 secured'to the ,bed 13 (see :Fig. :limit the outward movement of the cross members, and hence of;the,jaws and jaw actuating and carrying arms 29. c

,Iln -,ajddi tio n :to the cross-head operating and jaw swinging .cams, six in number, all mounted on theshaft 3,4, the latter has two additional cams, namely, a ,cam .52 which controls the lowering the mandrel, and a cam 53 which controls the operationsof stripper, to be referred to, which strips-the tubes off the mandrel thesertwo clams being positioned on-the shaft in proper relation to the other cams on the same shaft to produce the desired results. The cam 52 is on one end of the shaft 34L outside :theend-fra ne member 11, and this cam isengaged by a rol r emw'hie iscarr ed y th uupperien of the slide 18 carrying the mandrel support 17, the design of this cam being such that the mandrel is lowered at the proper instant in the cycle of operations, and a'predetermined time later is elevated.

The stripper cam '53 is 'locatedon the shaft between the cross-head cams .4 1, 41. The side :face of this cam is engaged b.y a roller 55 (see Figs. 1 and 3.), which roller is .carried by an arm516 pivoted atdits upper .end all- 517 .tothe top member 12 of the frame, this arm '56 having connected to it a rather stiff spring 58, the action of which is to at all times hold vthe roller 55 against the face of the cam and to swing the arm :56 toward the left (as the machine is viewed-in Fig. 1) when the -roller .55 drops into a depression indicated at 53 in the face .of the .cam. As shown in Fig. 3, the stripper arm 56 has at its lower end a :rod .59 which projects .laterally @from one side of the machine and then downwardly. The downwardly turned end ofzthis rod has a loose .rconnec-tion with a stripper blade :60, pivoted at its outer .end

to'bracket 61, .in thisginstance attachedrtoione of .the cross members .28 ,carr-ying one of the folding jaws. The inner end .of this stripper :blade 60 rides over the mandrel i. eflover :that "part of the mandrel next to the mandrel support L7, :this blade alying normallyflon the mandrel just beyond Ethat part thereof ;on'whichth e tube is formed. The timing of the stripper cam is suchgthat immediately after -,the-ma-ndrel iselevated from the die following the last of the tube forming ope at cn the roller :55-S11aps int the depressed part .of ,the i cam permitting the pring .8 t sw ng t e st pp r M11156 t the left as viewed in Fig. 1. ,This swings the inne f s nd a the etnippe lade .60 e the mand e so to str p th tube e the latter and cause it to Joe discharged through the end frame member ;10 into a bl re eptac e whi h may :be pr vided f r tha Purpose v 1n op r t en th epera e p aces ove th bending jaw- 1257311 b twee the. mandrel an cd e, a strip imete ie stitu ng the stock -;fI OIl1 which the tube is to be. for ed, w ch sto k pr vious y t to.

pr pe imens ns, an hes it edg s erimp d i .2 fash on, r w h t edg s ben rrigh ang es r1 0 th nk and in op- PO ted r Gt- QnS, srind at d in ig aand This stock will be tapered, i e. somewhat wider at one end than the other if ,a bow sOQket is to ,beformed, but will have par allel=edges i fia tube is to {be formed as large at one end as at the other. In placing-this stock ,on the folding jaws the operator positions thestock properly :by placing on'e edge against a gauge 1313118101 stop-:61 (see Figs. 3 and 5;)gwhich gauge iscarri'ed ;by 0116 of the :hloeks;26, rte which one of the folding jaws 25 i attached. 'i' he :.'parts ;are :11. win

fit

position shown conventionally in Fig. 5. If the machine is stationary, the operator then starts the machine in operation, whereupon the cam 52 lowers the mandrel, and at or about the same time the cross-head is lowered causing the presser blade 21 to press the mandrel well down into the die and to bend the stock into U-shape as indicated in Fig. 6, the lowering of the crosshead being due to the action of one of the rollers of each of the two cross-head cams. Immediately after the operation just stated, the cross-head and presser blade are elevated, and at or about the same time the yoke cams cause the folding jaws to be swung inwardly so as to bend inward the upstanding edge portions of the stock and to cause the crimped edges to be interlocked substantially as shown in Fig. 7. Im-

mediately after this operation the folding aws swing outward, and at or about the same time the other two rollers of the crosshead cams again lower the cross-head and presser blade which now descends onto the interlocked crimped edges of the stock and forcibly presses the same downward against the mandrel so as to form a tight seam, the parts being now in the position substantially as shown in Fig. 8. Immediately following this the cross-head and presser blade are elevated, and at or about the same time the mandrel controlling cam 52 elevates the mandrel and the tube formed on it, and as soon as the mandrel is elevated the stripper cam 58 permits the stripper blade to be wiped over the end portion of the mandrel by the action of the stripper spring 58 so as to strip or forcibly kick the tube off the mandrel. This completes the cycle of operations for forming one tube. The operator will then place another piece of stock into the machine and the operations will be repeated.

All the tube forming operations above explained are performed while the shaft is traveling through about one-half a revolution or less, so that the operator can utilize the other half of the revolution of the shaft to place in position on the machine the stock for forming the next tube. Since the operations are performed partly simultaneously and partly successively but with the successive operations following each other with rapidity, the machine can be operated continuously even with a high speed motor since the operator has ample time to handle his stock without stopping the machine between cycles of tube forming operations.

I believe it is entirely new with me to provide among other things, folder blades which are mounted so as to swing inward and outward rather than to slide with straight line movement over supporting surfaces, this improved arrangement having a decided advantage over the sliding movement or action since the movements of the blades are not obstructed or interfered with by dirt or other matter which might obstruct or interfere with the action of sliding blades.

The machine is otherwise very powerful and reliable, and performs very effective work, these results being due to the general design or construction including the single operating shaft carrying all the operating cams.

Having described my invention, I claim 1. In a tubing machine having a die and a mandrel adapted to be received by the die, and about which fiat stock is adapted to be formed into a tube, folding blades for folding stock about the mandrel, a presser member for pressing the edges of the stock into a seam, swinging members carrying the presser blades, each member being pivoted at one end and carrying the associated folding blade intermediate its ends, and means operating on the free ends of the swinging members to move the free ends inwardly for the folding operation.

2. In a tubing machine having a die and a mandrel adapted to be received by the die, and about which fiat stock is adapted to be formed into a tube, folding blades for folding stock about the mandrel, a presser member for pressing the edges of the stock into a seam, swinging rods pivoted at their lower ends and intermediate their free ends carrying the folding blades, and means operating on the upper ends of the rods for swinging the folding blades inwardly and outwardly.

3. In a tubing machine having a die and a mandrel adapted to be received by the die, and about which fiat stock is adapted to be formed into a tube, folding blades for folding stock about the mandrel, a presser member for pressing the edges of the stock into a seam, swinging rods pivoted at their lower ends and carrying intermediate their ends the folding blades, a shaft at the upper part of the machine having means for operating the presser member and for swinging the upper ends of the rods inwardly and outwardly.

4. In a tubing machine having a die and a mandrel adapted to be received by the die, and about which flat stock is adapted to be formed into a tube, folding blades for folding stock about the mandrel, a presser member for pressing the edges of the stock into a seam, swinging rods pivoted at their lower ends and intermediate their ends carrying the folding blades, a

shaft at the upper part of the machine having cams for shifting the presser member and about which flat stock is adapted to be shifting the mandrel, for shifting the presser member, and for swinging the rods.

6. In a tubing machine having a die and a mandrel adapted to be received by the die and about which fiat stock is adapted to be formed into a tube, folding blades for folding stock about the mandrel, a presser member for pressing the edges of the stock into a seam, swinging rods pivoted at their lower ends, carrying the folding blades, means for actuating the rods comprising a cross shaft having cams, and

yokes adapted to be engaged bythe cams carried by the upper ends of the rods.

7. In a tubing machine having a die, and a mandrel adapted to be received by the die and about which fiat stock is adapted to be formed into a tube, folding blades for folding stock about the mandrel, a presser member for pressing the edges of the stock into a seam, swinging rods pivoted at their lower ends, carrying the folding blades, means for actuating the rods comprising a cross shaft having cams, and yokes adapted to be engaged bythe cams carried by the upper ends of the rods, the yokes having rollers and the cams having rollers adapted to engage the rollers of the yokes.

In testimony whereof, I hereunto aflix my signature.

DAVID F. DOMIZI; 

